<%= form_with(model: @micropost, local: true) do |f| %> 
<%= render 'shared/error_messages', object: f.object %>
<div class="field">
		<%= f.text_area :content, placeholder: "Compose new micropost..." %> </div>
<%= f.submit "Post", class: "btn btn-primary" %> 
<span class="image">

<%= f.file_field :image, accept: "image/jpeg,image/gif,image/png" %>
</span>
<% end %>

<script type="text/javascript">
$("#micropost_image").bind("change", function() {
var size_in_megabytes = this.files[0].size/1024/1024; 
if (size_in_megabytes > 5) {
  alert("Maximum file size is 5MB. Please choose a smaller file.");
          $("#micropost_image").val("");
        }
});
</script>